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Finding the Fourth Proportional to 68,366,861.40, 102,550,292.10 and 65,978,074.20

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Solution

The fourth proportional to 68,366,861.40, 102,550,292.10 and 65,978,074.20 is: 98,967,111.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,366,861.40 : 102,550,292.10 = 65,978,074.20 : x
  2. Step 2: Convert to fraction form
    68,366,861.40/102,550,292.10 = 65,978,074.20/x
  3. Step 3: Cross multiply
    68,366,861.40x = 102,550,292.10 × 65,978,074.20
  4. Step 4: Simplify right side
    68,366,861.40x = 6,766,070,781,405,474
  5. Step 5: Solve for x
    x = 6,766,070,781,405,474/68,366,861.40
  6. Step 6: Final answer
    x = 98,967,111.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.